“30 Rock” star Tracy Morgan was rushed to the hospital yesterday after collapsing at the Sundance Film Festival in Park City, Utah.

Shortly after accepting the Spotlight Initiative Award at the Creative Coalition Spotlight Awards dinner, Morgan fell unconscious. His representative describes his illness as a mixture of exhaustion and altitude. No drugs or alcohol was found in his system.

Tracy Morgan tweeted from Park City Medical Center this morning: “Superman ran into a little kryptonite. The high altitude in Utah shook up this kid from Brooklyn. Thank U 2 the hospital staff. Back at work 2morrow shooting 30 Rock. Holla at me!”